Can we expect that it will be running trains in and out of Melbourne or is this a once off visit?
The GML is back out the front of GEMCO a lot of work is needed on it so it will probably not be running for a while. If one of the RLs stops working and QUBE cannot get another RL down from Sydney then the GML might be the only thing left they can use.
GML 10 has unfortunately been attacked by the spray can. https://www.railpage.com.au/railcams/albion2/photo/19679632646 Photo taken via Albion on a light engine movement from Somerton to Gemco.